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RISS 인기검색어
- 검색키워드
- 저자 : Changjoo Kim (검색결과 32 건)
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Kim, Tae Hoon,Hahn, Joohee,Jeong, Ju-Ri,Lee, Changjoo,Kim, You Jin,Choi, Sung Min,Jeon, Da Young,Lee, Jin Hwa,Lim, In-Hyuk,Lee, Wan-Hee korean Academy of Physical Therapy Rehabilitation 2016 Physical therapy rehabilitation science Vol.5 No.4
Objective: The aim of this study was to measure the muscle architectural parameters of abdominal muscles in healthy individuals by rehabilitative ultrasound imaging (RUSI) and to investigate their changes after bridging exercise in various environments. Design: Cross-sectional study. Methods: The study included 40 healthy participants (19 men, 21 women). Subjects were randomly allocated to a stable surface group (SG, n=20) or an unstable surface group (UG, n=20). The participants assumed three positions in rest, bridging exercise with knee flexion $60^{\circ}$, and bridging exercise with knee flexion $90^{\circ}$ for the measurement of abdominal muscle thickness by RUSI. For the resting position, the participants held the head neutral in a hook-lying position and the dominant side was measured. For contraction, the participants performed the bridging exercise with the knee joint in $60^{\circ}$ and $90^{\circ}$ of flexion for 10 seconds each. Results: For transversus abdominis, external oblique muscle thickness, within the stable surface group and the unstable surface group, no significant contraction difference was observed in both the $60^{\circ}$ and $90^{\circ}$ bridge exercise conditions. Contraction difference of internal oblique muscle was significantly larger at $90^{\circ}$ than at $60^{\circ}$ within the SG (p<0.05). But within the UG, no significant contraction difference was shown. There was no significant contraction difference between the surface group and the unstable SG at $60^{\circ}$ condition and at $90^{\circ}$ condition in all measured muscles. Conclusions: The contraction difference is different for each muscle during bridge exercise with knee flexion $60^{\circ}$ and bridging exercise with knee flexion $90^{\circ}$. Muscle contraction difference is generally large when exercised on an unstable surface than a stable surface, but these are not statistically significant when bridging exercise is performed using dynamic air cushion for unstable surface.
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Electrochemical degradation of organic dyes with a porous gold electrode
Younghun Kim,Jieun Kim,Changjoo Yeom 한국화학공학회 2016 Korean Journal of Chemical Engineering Vol.33 No.6
Electrochemical degradation of methylene blue (MB) and rhodamine B (RhB) was studied at porous gold (PAu) electrode in presence of KCl as supporting electrolytes. PAu electrode with three-dimensional porous structure was prepared by paper-based method and used as working electrode. Based on the cyclic voltammetric test, the redox potential of of MB and RhB contained in KCl solution was found and the electrochemical degradation was conducted at fixed applied voltage. The direct oxidation of organic dyes involved using PAu and Pt electrodes, while the indirect electrolysis was mediated by active chlorine electro-generated from KCl solution. The results showed that PAu electrode with porous structure has high electrochemical activity with fast kinetics for the destruction of RhB (0.0448 min−1) and low energy consumption (0.315 kWh/m3), compared to smooth Au foil and reported others. In addition, the durability test for 10 serial degradation showed that PAu electrode has a good reproducibility and high adaptability for practical application.
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착저형 수중장비를 이용한 수중작업 시 작업경계면 인식을 위한 소나시스템 활용법
신창주(Changjoo Shin),장인성(In-Sung Jang),원덕희(Deokhee Won),서정민(Seo Jung-min),백원대(Won-Dae Baek),김기훈(Kihun Kim),김종훈(KIM JONG HOON) 한국산학기술학회 2016 한국산학기술학회논문지 Vol.17 No.10
수중사석고르기 장비와 같은 착저형 수중장비를 활용하여 해저면에서 수중 작업을 수행할 경우 해당 장비는 작업경계면을 정확히 인식하고 작업장 내에 자리잡고 있는 것이 중요하다. 이는 장비 전복과 같이 장비 안전사고와 직결될 수 있기 때문이다. 이 때 작업경계면 표식을 위해서는 잠수부의 도움이 필수적인데, 이를 위하여 잠수부가 수중작업을 수행할 때 작업이 용이하면서도 시중에서 쉽게 구할 수 있으며 재료를 선정하는 것이 중요한데 나일론줄을 해저면에 설치하여 작업경계를 표시하도록 하였다. 수중에서 주변 환경을 관찰하기 위하여 소나와 팬틸트를 이용하여 소나시스템을 구성하였으며 이를 이용하여 거리변화에 따른 수중 작업경계면 탐지 여부를 확인하였다. 또한 수중사석고르기 장비에 최종적으로 소나시스템을 설치하고 나일론줄로 표시된 작업경계면에 대한 탐지여부를 검증하였다. 본 연구결과를 활용하여 착저형 수중장비를 이용한 수중작업 시 작업경계면 인식을 수행할 수 있는 방안을 확보하였다. 작업경계면 인식 방안을 활용할 경우 추후에 개발될 수 있는 다양한 종류의 착저형 수중작업 장비의 작업절차에 광범위하게 적용할 수 있을 것으로 판단된다. The detection of an underwater work space boundary is very important when an underwater construction is carried out using seabed type underwater equipment, such as underwater machines for rubble mound leveling, because it can induce industrial disasters. Therefore, divers are needed to mark the underwater work space boundary. A nylon rope is used to improve the convenience during an underwater diver"s work. The results showed that the work space boundary can be detected using a sonar system. Using these results, an efficient method to detect the underwater work space boundary can be obtained when an underwater construction is carried out using seabed type underwater equipment.
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김창주(Changjoo Kim) 연세대학교 신과대학(연합신학대학원) 2016 신학논단 Vol.85 No.-
The Hebrew rbd (DBR), frequently mentioned in the Hebrew Bible, mirrors ancient Israel’s thought. Etymologically speaking, it is certain that the radicals are closely interrelated to the ancient near eastern languages. Three radicals are not easy to find its equivalence from other languages. DaBaR can be translated into sometimes ‘word,’ or other times into ‘matter.’ The word looks homograph morphologically, but implies content and action semantically. If so, how can the Hebrew word both imply dynamical sense and movement? The answer of this question is explained from its etymological study and its relevance of near languages, the Semitic. Several words, such as word (rb"d"), inner sanctuary (rybiD>), pestilence (rb,d,), pasture (rb,Do), deserts (rB"d>mi), rafts (hr"b.Do), look interconnected to the Hebrew rbd, or the Semitic DBR. These vocabularies are used in an independent sense, but are associated with one another. This article tries to explore what the three radicals come from and how the different usages are possible. Then, their reciprocal meaning and its theological significance are discussed at the development stages. At last, this study focuses on the three radicals DBR’s etymology, circulated usages and associated implications. According to this study it is important to understand how the words, dabar, debir, dober, deber, keep in close connected to one another. It is likely that the words above are originated from similar roots or interconnected radicals but emerged into the present DBR form. Therefore those terms could be interrelated in the Hebrew Bible. The Hebrew rbd (DBR), frequently mentioned in the Hebrew Bible, mirrors ancient Israel’s thought. Etymologically speaking, it is certain that the radicals are closely interrelated to the ancient near eastern languages. Three radicals are not easy to find its equivalence from other languages. DaBaR can be translated into sometimes ‘word,’ or other times into ‘matter.’ The word looks homograph morphologically, but implies content and action semantically. If so, how can the Hebrew word both imply dynamical sense and movement? The answer of this question is explained from its etymological study and its relevance of near languages, the Semitic. Several words, such as word (rb"d"), inner sanctuary (rybiD>), pestilence (rb,d,), pasture (rb,Do), deserts (rB"d>mi), rafts (hr"b.Do), look interconnected to the Hebrew rbd, or the Semitic DBR. These vocabularies are used in an independent sense, but are associated with one another. This article tries to explore what the three radicals come from and how the different usages are possible. Then, their reciprocal meaning and its theological significance are discussed at the development stages. At last, this study focuses on the three radicals DBR’s etymology, circulated usages and associated implications. According to this study it is important to understand how the words, dabar, debir, dober, deber, keep in close connected to one another. It is likely that the words above are originated from similar roots or interconnected radicals but emerged into the present DBR form. Therefore those terms could be interrelated in the Hebrew Bible.
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항공 교전 LVC 시뮬레이션의 네트워크 성능 예측 도구 설계 및 구현
문창주(Changjoo Moon),노승환(Soonghwan Ro),김성호(Sungho Kim),김천영(Cheonyoung Kim) 한국정보기술학회 2014 한국정보기술학회논문지 Vol.12 No.11
LVC Simulation is composed of Live, Virtual and Constructive systems which are linked by wired/wireless network. Massive simulation data greater than that of individual simulation is transmitted in real-time in order to share informations which are necessary to simulate synthetic battlefield. Therefore in order to construct correct battlefield reproduction and fair fighting environment, prediction and analysis of network resources are necessary in building the LVC simulation system. This paper propose tools and methods with which network performance can be predicted and analyzed in aviation engagement LVC simulation system using the network simulation. To estimate the bandwidth of wired link we implement network bandwidth prediction system and tool for the LVC simulation based on the DIS protocol. Also for wireless link we determine an extensible simulation system and implement a wireless protocol model using the QualNet network simulator.
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김도현(Dohyun Kim),이병관(Byungkwan Lee),심종현(Jonghyun Shim),이창주(Changjoo Lee),김청균(Chungkyun Kim) 한국트라이볼로지학회 2008 한국트라이볼로지학회 학술대회 Vol.2008 No.6
The connecting rod is the tribological part of automobile's engine. Since it is operated under several loads such as a compressive force, tensile force, bending force and high heat, it has strength and hardness which stand them. The pin-bushing bearing is a very important part is used at the small end of a connecting rod. It has a two part, Copper alloy and beck metal. As It contacts with a pinston pin, it has good strength, lubricating ability. So in this paper, we measure the vickers hardness of pin-bushing bearings and take a picture of the boundary line of pin-bushing bearings for analizing the physical properties of a pin-bushing bearing.
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( Tae Hoon Kim ),( Joohee Hahn ),( Ju-ri Jeong ),( Changjoo Lee ),( You Jin Kim ),( Sung Min Choi ),( Da Young Jeon ),( Jin Hwa Lee ),( In-hyuk Lim ),( Wan-hee Lee ) 물리치료재활과학회 2016 Physical therapy rehabilitation science Vol.5 No.4
Objective: The aim of this study was to measure the muscle architectural parameters of abdominal muscles in healthy individuals by rehabilitative ultrasound imaging (RUSI) and to investigate their changes after bridging exercise in various environments. Design: Cross-sectional study. Methods: The study included 40 healthy participants (19 men, 21 women). Subjects were randomly allocated to a stable surface group (SG, n=20) or an unstable surface group (UG, n=20). The participants assumed three positions in rest, bridging exercise with knee flexion 60˚, and bridging exercise with knee flexion 90˚ for the measurement of abdominal muscle thickness by RUSI. For the resting position, the participants held the head neutral in a hook-lying position and the dominant side was measured. For contraction, the participants performed the bridging exercise with the knee joint in 60˚ and 90˚ of flexion for 10 seconds each. Results: For transversus abdominis, external oblique muscle thickness, within the stable surface group and the unstable surface group, no significant contraction difference was observed in both the 60˚ and 90˚ bridge exercise conditions. Contraction difference of internal oblique muscle was significantly larger at 90˚ than at 60˚ within the SG (p<0.05). But within the UG, no significant contraction difference was shown. There was no significant contraction difference between the surface group and the unstable SG at 60˚ condition and at 90˚ condition in all measured muscles. Conclusions: The contraction difference is different for each muscle during bridge exercise with knee flexion 60˚ and bridging exercise with knee flexion 90˚. Muscle contraction difference is generally large when exercised on an unstable surface than a stable surface, but these are not statistically significant when bridging exercise is performed using dynamic air cushion for unstable surface.
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